Eve's sin, according to the biblical narrative, was disobedience to God's command not to eat from the Tree of the Knowledge of Good and Evil.
The account in Genesis describes Eve being tempted by the serpent to eat the forbidden fruit. The serpent questioned God's motives, suggesting that God was withholding knowledge from Adam and Eve. Eve then succumbed to the temptation, eating the fruit and offering it to Adam, who also ate it. This act of disobedience is considered "the Fall," leading to the expulsion of Adam and Eve from the Garden of Eden and the introduction of sin and death into the world.
It's important to note that interpretations of Eve's actions vary. Some see her as foolish and easily deceived, while others view her as seeking knowledge and self-awareness. Regardless of the interpretation, the central sin remains the violation of God's direct command.
The perceived consequences of Eve's sin have had a significant impact on cultural and religious views, particularly concerning women. As the reference text indicates, she has been sometimes associated with lust and considered responsible for introducing "concupiscence" (strong sexual desire; lust) into human nature, a view that has historically contributed to negative stereotypes about women.
In summary, Eve's primary sin was the act of disobeying God's command and eating the fruit from the Tree of the Knowledge of Good and Evil, an act which has far-reaching theological and cultural implications.